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ROTARY PUMP.

` J. BREWER.

\ No. 353,199. Patented Nom-'23, 1886.

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(No Model.)

J. BREWER,

RoTABY PUMP.

No. 353,199.- Pat'nted Nov; 2s, 1886.

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(No. Model.)

Patented Nov.

UNITED STATES PATENT OFFICE.

JAMES BREWER, OF PUEBLO, COLORADO.

ROTARY PUMP.

sPEci'FICATIoN forming part of Letters Patent No. 353.199. datedNovember 23.1886- Application filed June 12, 1886. Serial No. 204,962.(No model.)

.To all whom it may concern:

Be it known that I, JAMES BREWER, a citizen of the United States,residing at Pueblo, in the county of Pueblo and State of Colorado, haveinvented certain new and useful Improvements in Rotary Pumps; and I dohereby declare the following to be a full, clear, and eX- actdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to rotary pumps; and it consists in theconstruction and arrangement of the parts which will be fullyhereinafter described, and pointed out in the claims.

One object of my invention is to provide a pump that can be easily andreadily operated to throw a continuous stream of water, without jerks orspurts, absolutely air and water tight, and capable of raising water toa great height or distance above or from below the surface of theground, requiring but little power proportionate to the workaccomplished to operate it.

A further object of my invention' is to construct lthe parts of thedevice in a simple and efcient manner, rendering them in a condition tobe easily handled and operated, applicable to any desired use, andreadily transported.

I attain these objects by the mechanism illustrated in the accompanyingdrawings,

wherein like letters of reference indicate similar parts in the severalviews, and in which'- Figure -1 is a side elevation of my improvedrotary pump as set upfor underground drainage. Fig. 2 is a top plan viewof the device. Fig. 3 is a longitudinal vertical section on the line m.fr of Fig. 2. Fig. 4 is a transverse vertical section on the line y yof Fig. 2. Fig. 5 is a detail perspective view of the drum and shaftwith the piston wings in connection therewith. Fig. 6 is a detailperspective view of the piston-slides.

A indicates the outer shell or casing, having securing-angesA on each ofits sides, which engage with the heads A, being secured by bolts a. Theends of the shell A have lugs A3 cast therewith, which are adapted to beattached to a suitable supporting framework. A shaft, B, cast integralwith the in# ternal drum, C, passes through the heads A2. The ends ofthe shaft B extend outside of the power medium mounted thereon,preferably a bevel-gear-wheel, B', as shown in the drawings.

under portion thereof for the ingress of water, while a pipe, PQ ofsmaller diameter is connected to the upper part of the shell for theingress of the water. The pipe P is formed with a elbow extending ashort distance away from the shell, so that the water forced up throughit will not receive the full resistance of the atmospheric pressuredirectly on the exit-opening, thereby allowing a somewhat easier `upwardflow.

The curves of the central wall of the shell, both upper and lower, arestruck from a common center,and therefore have the same radii. Theradius of the upper wall, a', is shorter than that of the lower wall,a2, the two curves being connected by short curves struck from differentcenters than are the said upper and lower walls. These short connectingcurves, as shown at the points a" and a4, are of greater inclinationthan the curves of the upper and lower walls, for a purpose which willbe hereinafter described, This series of curves forms an irregularellipse whose diameter is equal in all directions on a line drawnthrough the central point, l. This point lis also the central pointofthe shaft B, upon which is mounted the metallic drum C, which hasconsequently the same center. The upper part of this drum C restsagainst the upper part, a', of the internal wall of the shell, and beingof shorter diameter than thelower wall, a2, a space of predeterminedwidth is left between the said lower wall, a?, and the lower peripheraledge of the drum C. The shaft B passes transversely through this drum G,being cast integral therewith.

Non-frictional piston-slides D D pass transversely through the drum Cand shaft B at right angles to each other, thereby dividing the saidvdrum into quadrangular sections c,

The shell A has a pipe, P, connected to the i IOO which are cast hollow7as shown in Figs. 3 and 5, leaving the heads, peripheral surfaces, anddivisional walls on each side of the pistonslides D-and D' of suitablethickness to resist the hydraulic strain exerted thereon. A series ofopenings, c', is cut through each head of the drum C, which extend backa short distance from the peripheral edge of said drum, the remainingportions of the said heads being constructed in the form of a web, whichextends to the shaft B, forming asolid top wall on each side of thedrum. The peripheral walls of said drum are also solid, except at thepoints where slots are formed for the passage of the piston-slides D andD', said slots'extending across the entire peripheral surface or walls.The quadrangular sections are thus provided with a wall on each side,the internal porti'on being left hollow and constructed by means of acore-casting. By this means a lighter as well as astronger and moredurable construction is obtained.

As shown in Fig. 6, one of the piston-slides, D, is constructed of asingle piece of metal, and the other slide, D', of two sections, whichif united will be of the same length as the slide D. The slide D has aslot, d, cut at its central portion, and extending down about midway orbelow the central point of its width. In like manner the two sectionsforming the other slide, D', have slots d' d' cut therein, but reverselyto the slot d in the slide D, being cut from the opposite side. Thesetwo slots d d' extend upwardly the same distance as the slot d extendsdownwardly, and the width of said slots d', when united, corresponds tothe width of the slot d. In the upper and lower portions of the slides Dand D' slots d2 and d3 are formed, leaving projections d4 and d5 on theends, the depth of said slots or recesses d? and di beingequal to thethickness of the heads of the drum C, under which the said slots t andhave movement. The projections d* d5 pass up through the openings c',and are flush with the surfaces of the heads of the drum.

Suitable packin gs are applied to all the parts ywhere it is necessary,the heads of the drum (l having a circular packing, c2, placed close tothe peripheral edge of the said drum, which are supported in a grooveand rest upon suitable springs. This circular packing c2 is separated ateach of the openings c',so that theproj ections d" and d5 of thepiston-slides D and D' will have an easy passage through the saidopenings. The top portions of the projections d* and d5, as well as theperipheral edges of the pistonslides D and D', are provided withsuitable spring-mounted packings, d and dl, which are tted in suitablegrooves in the parts described, having a thin projection extending intothe groove, and the outer portion of packings d6 being constructed ofthe saine width as the width of the said parts, the packings on theprojections extending outward flush with the circular packing c2, andback toward the central part of the drum a sufficient distance, beinglimited by a shoulder formed in the said projections.

In addition to the paekings just described,

supplementary packings c3, mounted in like manner, are placed j ust inthe rear of the circular packing o2, adjacent to the openings c', oneach side, to prevent any passage or escapement of the fluid to theinterior of the drum C.

At the upper portion of the curved wall a4 a packing, a5, ismountedvhich prevents any pass of the water around through upper portionof the shell. These paekings may be of any preferred form ofconstruction and of material adapted for the purpose.

The above construction having been fully carried out, the operation ofthe device will be as follows:' Suitable gearingfpower being applied tothe bevel-wheel B', the shaft B, and consequentlythe drum@,willrevolveinthedirection indicated by the arrows in Fig. 3. Theslides D and D', passing through the slots cut in the drum C, willalternately be shoved through and project from one side of theperipheral of the said drum as they are brought into contact with thevarying curvatures of the interior wall of the shell A. Vhere the drumis in contact with the upper wall, c', as shown, the pistonslides areshoved through the drum and come in contact with the lower wall, a2,until they ride around and strike the short curves a3 and a4, when theywill be gradually shoved through the opposite side of the drum, thus atall times having two ends of the said slides in contact with someportion of the interior wall of the shell, forming closed compartmentsbetween said wall, the peripheral edge of the drum,and the sides of theprojecting slides. The single piston-slide D passes backward and forwardthrough its slot in the drum C through the slots d' d', formed in thesectional piston-slide D'. The inside ends of the sections of the slideD', in their reversible sliding movement, strike each other through theslot d, formed in the piston-slide D, producing the same effect uponeach other as the walls of the shell do upon the slide D. The slotsthrough which these slides work are constructed of suflicient width tojust allow the said slides to pass therethrough and accurately registerwith each other, the said slides being constructed, as'described, so asto easily slide into the drum without the use of unnecessary slots. Asthe lower wall, a2, from the lower portions of the short curves co3 anda4 is equally distant from the central point, l, and consequently havingthe same and equal radii, the slides between these points will extendoutward an equal distance. As they reach the lower portion of the shortcurved wall a* of greater inclination they will gradually and smoothlyrecede from that side of the drum and extend outward from the oppositeside thereof. Therefore the said slides D and D' are so mounted in thedrum C that when one side of either piston reaches the lower side of theshort wall a4 the other end of said pist-on will have just reached theuppermost portion of the curve of the wall a, thus causing agradually-increasing inclination at one end of t-he slides and a gradualdeclination at the other end.

As shown in Fig. 1, the pump is illustrated as being set up for raisingWater from below the surface of the ground. As the pistonslides D and Drevolve a suction is set up between the rear portion of the said slidesand the pipe, and the Water drawn up into the compartment formed asheretofore described, and carried around the lower portion of the shell,and as the slide bounding or forming the lower wall of said compartmentreaches the lower portion of the short curved wall c4 of increasinginclination the dimensions of the compartment are decreased by the slidegradually passing through the drum C, and the water forced into and upthrough the pipe P to any suitable place of deposit. By the time thatthe slide just described has reached the lower portion of the wall a4one end of the other slide will have passed the opening of..the pipe P,another compartment filled with water is formed, and the operation ofsuction, lifting, and forcing becomes continuous. By having a column ofWater behind and resting on each slide its motion is rendered easy'inits passage backward and forward through the drum C, due to the equalpressure on each side of each blade by a column of water above and belowthe same, the lower column of water sustaining the pressure by itsnon-compressibility.

The parts ofthe device will all be constructed of a size proportionateto the desired application, and of metal adapted for the purpose, andformed by means well known in the art.

It is obvious that many minor details in the construction andarrangement of the parts could be made and substituted for those shownand described without in the least departing from the nature andprinciple of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. In a rotary pump, the combination 0f a drum provided with circularpacking on' the exterior of its heads, and having diametric right-angledslots therethrough, piston-slides passing through said slots of a lengthequal to the distance apart at all points of the walls of the chamber inwhich the drum is mounted, and a shell or casing inclosing said drum thewalls of whose chamber form with the drum a pressure-chamber, and also acontinuous track for the ends of the pistonslides, and having ingressand egress openings diagonally opposite to each other at or near thecommencement and ending of said pressure-chamber, substantially asdescribed.

2. In a rotary pump, the combination of the shell A, having anelliptical chamber provided with ingress and egress openings, drum G,having diametric slots c', circularv packing c2, and supplementalpacking c3, piston-slides D and D', provided with packings d5 and dl,and means for operating the same, substantially as described.

In testimony whereof I affix my signature inV presence of two witnesses.

JAMES BREWER.

'- Witnesses:

CHARLEs S. HYER, EDWARD L. MILLS.

